微波消解-原子吸收法测定广藿香中矿物质元素及重金属含量

采用微波消解法处理广藿香，利用火焰原子吸收法测定广藿香中Mn、Zn、Fe、Mg、Ca5种矿物质元素，利用石墨炉原子吸收测定Cu，Pb，As3种重金属的含量。结果表明，广藿香中Mn、Zn、Fe、Mg、Ca、Cu、Pb、As含量分别为10．88μg／g、17．33μg／g、233．87μg／g、856．32μg／g、1213．41μg／g、3．68μg／g、0．42μg／g、0．18μg／g。本方法简单、准确，方法加标回收率为98．8％～105．0％，相对标准偏差为0．42％～1．96％。

Determination of trace elements and heavy metals in Pogostemon cablin Benth. by microwave digestion-atomic absorption spectroscopy

Contents of five kinds of mineral elements （Mn, Zn, Fe, Mg and Ca） and three kinds of heavy metals （Cu, Pb and As） in Pogostemon cablin Benth, were determined. Graphite furnace atomic absorption was adopted to determine Cu, Pb, As contents, and flame atomic absorption was used to determine Mn, Zn, Fe, Mg and Ca contents after P. cablin Benth. was digested by microwave-assisted sample digestion. The results showed that the contents ofMn, Zn, Fe, Mg, Ca, Cu, Pb and As were 10.88μ/g, 17.33μg/g, 233.87μg/g, 856.32μg/g, 1213.41μg/g 3.68μg/g, 0.42μg/g, and 0.18μg/g, respectively. The method was simple, rapid and accurate. The addition standard recoveries were between 98.8%-105.0%, and the relative standard deviation was between 0.42%-1.96%.